Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é a superfície do resultado indoor/carpet em 13 de outubro de 1996.
 ###Tabelas: CREATE TABLE coaches__&__staff (coaches__&__staff_id AUTO_INCREMENT PRIMARY KEY, Position VARCHAR, Name VARCHAR, Year at CU VARCHAR, Experience INT, Alma Mater VARCHAR) CREATE TABLE season-by-season_records (season-by-season_records_id AUTO_INCREMENT PRIMARY KEY, Season VARCHAR, Div. VARCHAR, Pos. VARCHAR, Pld. VARCHAR, Pts. VARCHAR, Play Offs VARCHAR, Trophy VARCHAR) CREATE TABLE doubles_finals (doubles_finals_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Partner VARCHAR, Opponents VARCHAR, Score VARCHAR) CREATE TABLE planned_or_proposed_stations (planned_or_proposed_stations_id AUTO_INCREMENT PRIMARY KEY, Station VARCHAR, Extension VARCHAR, City/Neighborhood VARCHAR, Projected opening VARCHAR, Park and ride? VARCHAR, Funded by ST2 ? VARCHAR) CREATE TABLE 2008_2009_table (2008_2009_table_id AUTO_INCREMENT PRIMARY KEY, Club VARCHAR, Played VARCHAR, Drawn VARCHAR, Lost VARCHAR, Points for VARCHAR, Points against VARCHAR, Tries for VARCHAR, Tries against VARCHAR, Try bonus VARCHAR, Losing bonus VARCHAR, Points VARCHAR)  
SELECT Outcome FROM doubles_finals WHERE Surface = indoor/carpet AND Date = 13 october 1996